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JAMB Physics 2021 Objective — Question 20

Question 20 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2021 Objective paper, with the correct answer and a full explanation.

Equation of wave y=0.15 sin200π(x−5.5t). Frequency and wavelength:

A. 500 Hz and 0.25 m
B. 550 Hz and 0.01 mCorrect
C. 400 Hz and 0.4 m
D. 325 Hz and 2 m

Explanation

ω=1100π → f=550 Hz; k=200π → λ=0.01 m.

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